Mass Transfer
Water-ethyl alcohal solution can be concentrated (in respect of alcohal concentration) by __________ distillation.

Vacuum
Atmospheric
High pressure
None of these

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Mass Transfer
The term "approach" in a cooling tower refers to the difference in the temperature of the

None of these
Cold water leaving the tower and the wet bulb temperature of the surrounding air
Hot water entering the tower and the wet bulb temperature of the surrounding air
Hot water entering and the cooled water leaving the cooling tower

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